AOACSPIFANMethods-2017Awards

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Pacquette & Thompson: J ournal of AOAC I nternational V ol. 98, N o. 6, 2015  1709

Table 8. Collaborative study raw individual results for Se (mg/kg, as is) a

Adult milk powdered

Infant powdered hydrolyzed milk

Adult powdered low fat

Infant elemental powdered

Adult RTF high protein

Adult RTF high fat

Lab No.

Child powder

1 a

0.182 0.203 0.183 0.182 0.208 0.211 0.193 0.210 0.123 0.112 0.045 0.073 0.087 0.098 0.236 0.215 0.227 0.244 0.304 0.291 0.214 0.205 0.210 0.220 0.109 0.107 0.135 0.143

2 3 4 5 8 9

0.225 0.230 0.234 0.238 0.299 b

0.245 b

0.235 0.250 0.253 0.252 0.107 0.0982 c 0.129 d

0.151 d

0.213 0.209 0.235 0.229 0.249 0.254 0.215 0.204 0.200 0.203 0.0893 0.0913 0.138 0.135

0.247 0.237 0.240 0.269 e

0.273 0.290 0.230 0.275 f

0.213 g

0.266g 0.0969 0.0989 0.129 0.137

0.227 0.232 0.243 0.247 0.273 0.273 0.218 0.222 0.206 0.216 0.0957 0.0919 0.134 0.134

0.235 0.230 0.234 h

0.230 0.282 0.254 i

0.219 j

0.244 0.225 0.224 0.100 0.106 0.135 k

0.135

10 11 0.252 l 0.237 0.231 0.245 0.256 0.195 0.215 0.216 0.199 0.0854 0.0849 m 0.122 0.125 0.215 0.215 0.236 0.235 0.263 0.261 0.210 0.207 0.201 0.202 0.0914 0.0913 0.136 0.136 0.140 a  Other rejected data are indicated by footnotes below. The value in each cell is the mean of the duplicate analyses required by the method. The paired results are the blind duplicates tested during the study. b  Although rejected by Cochran’s test these data points were kept in the final statistical analysis, as the data appear extraordinarily tight; if excluded, the RSD R falls to from 7.2 to 6.8%, and the HorRat from 0.37 to 0.35 for this product. c  Rejected, 8.4% duplicate precision, no retest result supplied. d  Although rejected by Cochran’s test these data points were kept in the final statistical analysis, as the data appear extraordinarily tight; if excluded, the RSD R falls to from 5.0 to 4.1%, and the HorRat from 0.23 to 0.19 for this product. e  Rejected, 7.5% duplicate precision, no retest result supplied. f  Rejected, 8.8% duplicate precision, no retest result supplied. g  Although rejected by Cochran’s test these data points were kept in the final statistical analysis as a conservative measure; if excluded, the RSD R falls to from 9.3 to 8.2%, and the HorRat from 0.46 to 0.41 for this product. h  Rejected, 15.1% duplicate precision, no retest result supplied. i  Rejected, 12.7% duplicate precision, no retest result supplied. j  Rejected, 8.4% duplicate precision, no retest result supplied. k  Rejected, 8.7% duplicate precision, no retest result supplied. l  Although rejected by Cochran’s test these data points were kept in the final statistical analysis, as the data appear extraordinarily tight; if excluded, the RSD R falls to from 6.1 to 5.2%, and the HorRat from 0.31 to 0.26 for this product. m  Rejected, 8.3% duplicate precision, no retest result supplied. SLV ( n = 6) 0.225 0.245 0.272 0.220 0.214 0.0961 0.204 l

Table 9. Collaborative study individual results for Mo (mg/kg, as is) a

Adult milk powdered

Infant powdered hydrolyzed milk

Adult powdered low fat

Infant elemental powdered

Adult RTF high protein

Adult RTF high fat

Lab No.

Child powder

1 a

0.273 0.271 0.154 0.158 0.535 0.517 0.234 0.234 0.139 0.131 0.161 0.155 0.205 0.194

0.317 b

0.366 b

0.217 c

0.194 c

0.633 0.618 0.304 d

0.272 d

0.173 0.167 0.163 0.161 0.210 0.210

2 3 4 5 8 9

0.375 0.383 0.222 0.220 0.598 0.597 0.267 0.255 0.204 0.211 0.205 e 0.203 e 0.309 0.311 0.199 0.190 0.566 0.580 0.273 0.275 0.183 0.177 0.157 0.159 0.211 0.204 0.207 0.202

0.321 0.320 0.206 0.204 f

0.606 0.592 0.290 0.280 0.185 0.188 0.164 0.166 0.203 0.203

0.301 0.304 0.192 0.192 0.564 0.586 0.272 0.269 0.171 0.170 0.154 0.155 0.195 0.192 0.312 0.314 0.195 0.195 0.583 0.592 0.275 0.275 0.169 0.172 0.157 0.155 0.193 0.196 0.341 0.334 0.225 0.228 0.592 0.593 0.299 0.289 0.199 0.203 0.160 0.156 0.195 0.195 0.327 0.330 0.207 0.211 0.613 0.599 0.288 0.287 0.181 0.181 0.167 0.167 0.213 0.213 0.193 a  Other rejected data are indicated by footnotes below. The value in each cell is the mean of the duplicate analyses required by the method. The paired results are the blind duplicates tested during the study. b  Rejected by Cochran’s test; if not excluded (to maintain eight laboratories’ data) RSD R is unchanged at 7.9%. c  Although rejected by Cochran’s test these data points were kept in the final statistical analysis, as the paired data appear extraordinarily tight; if excluded, the RSD R remains essentially unchanged. d  Although rejected by Cochran’s test these data points were kept in the final statistical analysis, as the data appear extraordinarily tight; if excluded, the RSD R falls to from 4.6 to 4.3%, and the HorRat from 0.24 to 0.22 for this product. e  Rejected by Single Grubbs’ test; if not excluded (to maintain eight laboratories’ data) RSD R rises from 3.0 to 9.0%. f  Rejected, 6.4% duplicate precision. 10 11 SLV ( n = 6) 0.294 0.184 0.565 0.261 0.160 0.154